diff --git a/CHANGELOG.md b/CHANGELOG.md
index e6a41534..c51b1c1c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -12,6 +12,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 
 ### Changed
 
+- ⚠️ Simplified Chinese (China) language code has changed from `zh` to `zh-cn`
 - Upgrade to Chart.js v3.9.1 ([#261](https://github.com/jpanther/congo/pull/261))
 
 ## [2.3.1] - 2022-07-30
diff --git a/i18n/zh.yaml b/i18n/zh-CN.yaml
similarity index 100%
rename from i18n/zh.yaml
rename to i18n/zh-CN.yaml